Visualization of Concentration Micro-Inhomogeneities in Fe–Ni Alloys

Abstract

The method of visually identifying microregions with increased nickel concentration in austenitic Fe–Ni alloys by the appearance of dark diffraction contrast in electron-microscopic images has been laid a foundation for. The appearance of such a contrast can be explained by the microdistortions arising as a result of local changes of the lattice parameter due to the changes in the composition, and also as a result of magnetostriction dilatation in these regions with increased Curie temperature.